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Phase imaging by the transport equation of intensity
Optics Communications, 1984Abstract The difference between a well-focused image and a slightly defocused image contains information about the phase of the object. This paper describes how to retrieve this phase information from images, formed by a noncoherent imaging system. Experiments with white light from an extended source are shown. A theoretical explanation for partially
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Optimum phase retrieval using the transport of intensity equation
SPIE Proceedings, 2014The Transport of Intensity Equation (TIE) relates linearly the phase of an object to the intensity distribution in the Fresnel region and can be used as a phase retrieval technique. The key element in a TIE based solver is the calculation of the axial intensity derivative.
J. MartÃnez-Carranza +2 more
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The transport of intensity equation and partially coherent fields
Biomedical Optics and 3-D Imaging, 2012We examine the physical meaning of the phase recovered from the transport of intensity equation (TIE) with partially coherent illumination and verify experimentally a modification of the TIE which removes effects of nonuniform illumination from measurements of sample thickness.
Jonathan C. Petruccelli +2 more
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Quantitative imaging of yeast cells using transport of intensity equation
2015 Workshop on Recent Advances in Photonics (WRAP), 2015In biology most microscopy specimens, in particular living cells are transparent. In cell imaging, it is hard to create an image of a cell which is transparent with a very small refractive index change with respect to the surrounding media. Various techniques like addition of staining and contrast agents, markers have been applied in the past for ...
Praveen Kumar Poola +2 more
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Phase Imaging from X-ray Intensity Images using Transport of Intensity Equation
Optica Digital Holography and Three-Dimensional Imaging 2024 (DH)X-ray imaging lacks phase information necessary for better medical diagnosis. We bridge the gap between X-ray imaging and comprehensive 3D visualization by using transport of intensity equation to recover the phase information.
Ram Kumar, Naveen K. Nishchal
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Two-Wavelength Transport of Intensity Equation for Phase Unwrapping
2016A novel method based on two-wavelength transport of intensity equation (TW-TIE) is proposed for phase unwrapping under large-step discontinuities condition. With a wrapped phase obtained by interferometry setup, two different wavelength illuminations are used to obtain two different intensity images, then TW-TIE is applied to phase unwrapping ...
Zhang Cheng +8 more
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Multiplicative Reconstruction Based on the Transport of Intensity Equation
2018In order to effectively recover the phase information of the object and reconstruct the three-dimensional shape of the object, a multiplicative reconstruction based on the transport of intensity equation (TIE) is proposed. Firstly, combining with the relationship between the light field moment imaging and the TIE, the phase information and the first ...
Cheng Hong +5 more
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High Resolution Phase Imaging using Transport of Intensity Equation
2022Quantitative phase Imaging(QPI) has emerged as a valuable tool for imaging specimens with weak scattering and absorbing abilities such as cells and tissues. It is complementary to fluorescence microscopy, as such, it can be applied to unlabelled specimens without the need for fluorescent tagging.
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Solving the Transport-of-Intensity Equation without the Usual Intensity Restrictions
Imaging and Applied Optics 2018 (3D, AO, AIO, COSI, DH, IS, LACSEA, LS&C, MATH, pcAOP), 2018Soheil Mehrabkhani +2 more
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